Today’s update of the popular ”Smash Bros: DOJO!!”, the official hype-site for the upcoming Super Smash Bros: Brawl introduced the “My Music” feature, where players can edit the likelyhood that their favourite, or least favourite track will play on different stages. What does this have to do with Zelda? The update’s accomanying picture provided an interesting Zelda tidbit.

So, we now know that there will be at least four Zelda tracks in SSB:B. The down arrow at the bottom right implies that there could be more! Extra tracks are unlocked by picking up CDs in-game, so this is very possible.
The titles of these tracks may also be hinting at currently unannounced Zelda-themed stages in the game. A Dark World stage could be very interesting, though personally I’m still hoping for a Wind Waker-style level.
Be sure to take this as pure speculation. Remember, Saria’s Song played in the Termina Bay stage in the last Smash Brothers, a theme and location which are games apart!

Smash Bros. DOJO!! - My Music